/**
 * 金额格式化
 * @param {number} number 要格式化的数字
 * @param {number} decimals 保留几位小数
 * @param {string} dec_point 小数点符号
 * @param {string} thousands_sep 千分位符号
 * @returns string
 */
function numberFormat(number, decimals, dec_point, thousands_sep) {
    number = (number + '').replace(/[^0-9+-Ee.]/g, '');
    let n = !isFinite(+number) ? 0 : +number;
    let prec = !isFinite(+decimals) ? 2 : Math.abs(decimals);
    let sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep;
    let dec = (typeof dec_point === 'undefined') ? '.' : dec_point;
    let s = '';
    let toFixedFix = function (n, prec) {
        let k = Math.pow(10, prec);
        return '' + Math.ceil(n * k) / k;
    };

    s = (prec ? toFixedFix(n, prec) : '' + Math.round(n)).split('.');
    let re = /(-?\d+)(\d{3})/;
    while (re.test(s[0])) {
        s[0] = s[0].replace(re, '$1' + sep + '$2');
    }

    if ((s[1] || '').length < prec) {
        s[1] = s[1] || '';
        s[1] += new Array(prec - s[1].length + 1).join('0');
    }
    return s.join(dec);
}
export {
    numberFormat,
};